"Originally, we all had brown eyes," said Professor Hans Eiberg from the Department of Cellular and Molecular Medicine. "But a genetic mutation affecting the OCA2 gene in our chromosomes resulted in the creation of a "switch," which literally "turned off" the ability to produce brown eyes." The OCA2 gene codes for the so-called P protein, which is involved in the production of melanin, the pigment that gives colour to our hair, eyes and skin. The "switch," which is located in the gene adjacent to OCA2 does not, however, turn off the gene entirely, but rather limits its action to reducing the production of melanin in the iris -- effectively "diluting" brown eyes to blue. The switch's effect on OCA2 is very specific therefore. If the OCA2 gene had been completely destroyed or turned off, human beings would be without melanin in their hair, eyes or skin colour -- a condition known as albinism.

Last edited by Steve James on Wed Feb 07, 2018 3:59 pm, edited 2 times in total.

"A man is rich when he has time and freewill. How he chooses to invest both will determine the return on his investment."

If I learned that I had the dna of the oldest recorded human inhabitant in my country, I'd be impressed. But, I think the Britain Firsters or Aryanists will say that skin color is a more important feature. After all, how could Brits have advanced without it.

Iow, don't bother trying to reason down what hasn't been reasoned up.

"A man is rich when he has time and freewill. How he chooses to invest both will determine the return on his investment."

so much racism over some tiny bit of genetic code that inhibits some melanin for literally some coloring differences.

amateur practices til gets right pro til can't get wrong/ better approx answer to right q than exact answer to wrong q which can be made precise /“most beautiful thing we can experience is the mysterious. Source of all true art & science